de mattia



Nov. 20,1923. 1,475,109

. P. DE MATTIA QQLLAPSIBLE CORE Filgg Sept. 7, 1922 5 Sheets-Sheet. 1

WIN/88158 INVENTOR PetcrDeMaZZicu Mm 1. 8V 6 I ATTORNEYS Nov. 20 1923.1,475,109

P. DE MATTIA COLLAPSI B LE CORE Filei v. L922 5 Sheets-Sheet 2 MlVE/VTOH.PeierDe Moctft'oo A TTORNEYS Nov. 20, 1923. 1,475,109

P. .DE MATTIA COLLAPSIBLE coma:

Filed Sept. '7. 1922 5 Sheets-Sheet 5v INIM . INVENTOI? WITNESSESpeier-pemzha MZW4% I 8.7

' A TTORNEYS Nov. 20 1923. 1,475,109

P. DE MATTIA COLLAPSIBLE CORE Filed Sept. v. 1922 5 Sheets-Sheet 5 ATTORNEYS Patented Nov. 20, 1923.

UNITED STATES PATENT OFFICE.

COLLAPSIBLE CORE.

Application filed September 7, 1922.

To all whom it may concern:

Be it known that 1, PETER DE Menu, acitizen of the United States, and aresident of Clifton, in the county of Passaic and State of New Jersey,have invented certain new and useful Improvements in Collapsible Cores,of which the following is a full, clear, and exact description,reference being had to the accompanying, drawings.

The present invention relates to collapsiblc cores used in themanufacture of pneumatic tires, more particularly the shoes or casingsfor pneumatic tires. As is well known to those skilled in the art, suchshoes or casings are built up of green or semi-cured rubber and fabricwrapped about a core, which imparts to them the shape desired, andthereafter they are removed from the core and vulcanized. It isdesirable that the core be of such construction that the removal of thobuilt-up tire shall be facilifated and effected with the least possibledistortion thereof, and to this end the cores are now generally made ofsegmental sections movable with relation to each other, so that certainsections are withdrawn from the tire and the core collapsed to a greaterless degree.

An object of the present invention is to produce a collapsible core inwhich the sections are arranged in opposed pairs, each pair havingcollapsing and expanding movements in opposite directions toward andfrom a position of operative continuity, and into and out of the planeof operative continuity, thus not only providing for a more effectivewithdrawal of the core sections, but the unobstructed movement there--of.

To the above end the invention consists of the collapsible core whichwill be herein-- after described and claimed.

The invention is illustrated in the accompanying drawings, in which-Figure 1 shows a plan view of the core and its operatinginstrumentalities, showing in dotted lines the retracted position of thekey sections, the operating wheel being removed;

Figure 2 shows a transverse section taken Serial No. 586,696.

on the line 2-2 in Figure 1, and showing in dotted lines the relativepositions of the core sections when collapsed or retracted;

Figure 3 shows a horizontal sectional view taken on the line 3-3 inFigure 2; V

Figure 4tshows a side elevation, parts being shown in dotted lines, anda portion being in section;

Figure 5 shows a perspective view showing the core sections collapsedand retracted;

Figure 6 shows a transverse sectional view through the tubular standardor post, and illustrating certain operative parts;

F igure 7 shows a plan view of a modified form of the device, a portionthereof being shown in transverse section;

Figure 8 shows a fragmentary plan view, portions being shown in sectiontaken on the line Q2 in Figure 9;

F igu're 9 shows a vertical sectional view with portions shown inelevation and with the retracted position of the core sections shown indotted lines;

Figure 10 is a fragmentary detail View, parts being shown in sectionillustrating the position of the obliquely -disposed shanks when thesections are extended;

Figure 11 shows a. side elevation of a portion of one of the shanks;

Figure 12 shows a section taken on the line 77 in Figure 13; and

Figure 13 shows a sectional view of portions of the device illustratingthe means for locking the shanks of two of the sections in a retractedposition.

Similar reference characters will be employed throughout thespecification and drawings to designate corresponding parts.

As shown, the core is made up of four sections, two relatively shortsegmental key sections 1, and two relatively long segmental sections 2,said sections forming when expanded, a complete circular core,andpreferably the meeting ends of the sections will be on lines cuttingthe plane of the core at 95 right angles and slightly converging fromthe inner to the outer periphery, as clearly shown in Figs. 1 and 3;thus the key sections 1 will be slightly wedge shape. The key sections 1are each secured to a shank 3, I

provided with shanks 5, i lich like the shanks 3 are angularly orobliquely disposed with relation to the plane of the core, l ut extendin the opposite d ection with rel-a tion to the shanks 3, and like the's 3 they are provided u on their opposin mer edges with rack teeth 6.

Extending upwardly from a base 7 a tubular 0r cylindrical post 8. whichnear its upper end is provided with diametrically opposed and angularlyobliquelv arranged bearin 's 9. Those bearings ie the obliquely disposedshanks 5 o; oriental sections 2, and in which t-h arranged to have treesliding movement. Near the bottom of the post 8 are similar bearings 10disposed upon diametrically opposite sides oi. the post and like thebear ings 9, arranged atan angle or obliquely to the plane oi the core,in which the shanks 3 are arranged to freely slide.

As shown in Fig. 1, e pairs of bearings right angles to each other sothat when the parts assembled the pair 0'? shanks 5 will be cisposed atright angles to the pair or" shan It will he observed that b thearrangement just described. the Yang movement of the shanks 3 will inoduce inward and outward movements the key sections 1 in an obliquedirection; hus it may be aid that the segmental see" are moved Lions 1obliquely to and from a position o't opera tive continuity. and into andout ot the plane of operative continr L the cor sections.

0 more t moment 'nto and plane 0t operative continuity is i tionopposite the corr suond ng oi oi? the key sections 1. such an a mentprovision is m;- lepsing n1 veinent of without interference withsections.

For the purpose to the sections, iratod in Figs. 1 to and members 1.

hin the hollow post Each member 11 and 12 is provided with teeth 13 and1 1-, and each is provided with a clutch member 15 and 16, and held inthe tubular post by means of screws 17 and 18 (see Figs. 2 and 6),engaging grooves 19- and 20. The teeth 13 of the combined gear andclutch member 11, engage the rack teeth 6 of the shanks 5. and the teethi l of the combined gear and clutch member 12 engage the rack teeth 4 ofthe shanks 3. A centrally disposed shaft sections oi t, v L m pt. 1 tingmoi einent t atus is illusthe and 12 are mounted the shaft. 21 by meansor a pin 26, that the le clutch member will p rtake oi the ry movementoi the shaft 21 and lso the longitudinal movement thereof. By means of te longitudinal movement the double clutch member is arranged to ged witheither the clutch member 15 or cue clutch member 16, by means ofintermeshing notches and teeth shown, and when engaged therewith therotary movement imparted to the shaft 21 will be imparted to thecombined clutch and members 11 and 12, so as to rotate them. and thus bymeans 01 the rack teeth 13 and 1 1, impart movement to the shanks 8 and5. By shifting the shaft 21 the double clutch member will be moved todisengage one ot the members and engage the other, or it may occupy aposition between them, disconnected from both.

i uming that the parts are in the position shown in Fig. 1, which may bedesc 'ibed as the position of operative continuity, with all parts or"the core in the same plane, which may be described as the plane ofoperative continuity, the key sections are intended to be withdrawnfirst. and to that end the shaft 21 will be moved downwardly, and thedouble clutch member 25 engaged with the clutch member 16; whereupon theshaft may be rotated by means oi the hand wheel 2 and the shanks 3simultaneously retracted, ca .ising the sections 1 to be withdrawn fromthe tire and to move downwardly and in wardly as indicated in dottedlines in Figs. 1 and Having been moved inwardly to the extent requiredto withdraw them from the tire, the shaft 21 .will be moved upardly toengage the clutch and gear member 11, which will cause the shanks 5 tobe retracted, imparting an inward and upward movement to the sections 2.thus those sections will be withdrawn from the tire and elevated, asindicated in dotted lines in Fig. 2. Of course the reverse movement willoperate the pairs of sections in a reverse direct-ion, moving each pairinto the plane of operative continuity in an oblique direction. and intoa position of operative continuity. I

A suitable stop is provided to limit the outward and downward moven'ientof the sections 2, this stop comprising a collar 27 held by a bolt 28 tothe end of one of the shanks 5, arranged to bear against the end of oneof the bearings 9. When this stop comes into contact with the bearing 9tie sections 2 will be expanded to the proper d gree to position themwith respect to the position of and plane of operative contin nity.

In Figures 7 to 13 inclusive is shown a modified form of the device, inwhicl'i the movement of the core sections into and out of a position ofoperative continuity and with relation to the plane of operativecontinuity is effected by a centrally disposed. and longitudinallymovable actuator so C0111- bined and arranged that moving the actuatorin one direction will alternately engage and retract the shanks ofoppositely disposed pairs of core sections, simultaneously displacingthem with relation to the plane of operative continuity, and the reversemovement of the actuator will alternately engage and extend the pairs ofcore sections and move them into the plane of operative continuity, andthe arrangement embodies means whereby in both positions the parts willbe held from movement or accidental displacement.

Like the form of the device which has been heretofore described, themodified form is composed of a pair of key sections 1 and a pair oflonger sections 2. Each of these sections is mounted upon an obliquelydisposed shank, the shanks 29 carrying the key sections 1 and the shanks3O carryi p; the longer sections 2. Preferably, the core sections inevery case will be made separate from the shanks and connected tieretoany suitable manner as by means of the screws or bolts 31. The pair ofshanks carrying the key sections extend downwardly and obliquely asindicated in 9, and the shanks 30 carrying the core section 2 extendupwardly and obliquely indicated in Fig. 10. The shanks 30 are disposedin obliquely arranged and diametrically opposed bearings 32 supported bythe cylindrical post 33, and in like manner the shanks E29 are receivedwithin and arranged to slide freely in the obliquely disposed anddiametrically opposed bearings at, at or near the base of thecylindrical post 33, and like the form which has been heretoforedescribed, these pairs of bearings are disposed at right angles to eachother. The bearings open into the bore or chamber ot' the pos. 33 insuch manner that the rack teeth 33 formed upon the inner opposed facesof the shanks 29 and 30 extend into the said chain her 35 in position tobe engaged by the rack teeth 37 formed upon the four sides of thelongitudinally movable actuating rod 38. lit .vill be observed that therack teeth 36 on the shanks are formed upon an angle of degrees, andthat the rack teeth 37 are of a corresponding angle, and that the rackteeth on each r or sh in opposite directions. a ing rod is prov:

upon "our sides, thos i5 etrically opposite sides being llS} see atright anrack teeth 36 and impart inward and outward movements to theshanks. The portion of the actuating rod which is provided with rackteeth 3"? is relatively short but it is of such length that a completelongitudinal nient thereof across the line oi? movement of the shankswill move those shanks a sutlicient distance to fully cctract them andto fully extend them, and also so that when the rack teeth 37 have movedone pair of shanks the required distance will at teat time and move theother pair 01": shanks. The actuating rot rise at its opposite ends,splines 39 and 4:0 located at diametrically opposed corners of theactuating), rod 38, the arrangement being such that at the time thetoothed sections release the pair of shanks 29 the splines 39 or 4:0 wilengage therewith. For this purpose each of the shanks 29 will beprovided with a gro ve d1 arranged to be engaged by the splines when therod is moved and just as the toothed sections 37 pass t om e1 gagernentwith the shanks 29 (see s. ll, 12 and 13). Any suitable means may beemployed to in ve the actuati red 38 lon 'itudinally, and in the drawi ait is shown as being provided with a head 42 provided. with handles 4:3.The

cylindrical post is provided with base dd which may be secured to anysuitable sup- )or t and in both cases it may be supported as indicatedin the drawings, or One form of support shown in ooeration, the operatorby means of the .iandles .23 imparts a. longitudinal movement to t isrod 38, and assuming that the core sections are in a position oroperative co tinuity and the plane of operative cont?" city the rackteeth 37 on the rod 38 will first engage the shanks 29 to retract andmove downwardly the key sections 1. The continued movement of the rod 38in the ame direction will cause the rack teeth 37 o engage the shanks 30and retract and eleate the core sections 2. A reverse movement of therod 38 will cause a reverse movement of the sections, placing them againin a position of operative continuity and in the plane of operativecontinuity.

ll ith all the parts in retracted position I provide spring actuatedbolt 46 having av head at? and mounted in one of the bearings 10,. theinner end of the bolt engaging a (See Fig.

r move the pairs of said core sections in opposite directions radiallyand in an oblique direction with relation to the position of and planeof operative continuity of the core.

3. A collapsible core, comprising a plurality of segmental core sectionsarranged in diametrically opposed pairs, and means to move one pair ofcore sections in opposite directions into and out of a position ofoperative continuity and in the same direction with relation to theplane of operative cont-inuity.

a. A collapsible core, comprising a plurality of core sections disposedin oppositely arranged pairs, inclined shanks carried by said sections,and means to engage and move the shanks of each pair of sections.

A collapsible core, comprising a plurality of pairs of oppositelydisposed sections and a common actuating device having a detachableconnection with, and arranged to move the pairs of sections.

6. i1 collapsible core, comprising a plurality of pairs of oppositelydisposed sections and a common actuating device for moving the pairs ofsections in opposite directions radially and obliquely toward and from aposition of and the plane oi operative continuity.

7 A collapsible core, comprising a cylindrical post, a shaft disposedtherein, bearings at diametrically opposite points on said post, coresections arranged in pairs having shanks arranged in pairs and slidingin said bearings, and means for alternately coupling the shaft to saidpairs of shanks.

8. A collapsible core, comprising a plurality of segmental coresections, a longitudinally movable shaft, and means for connecting saidshaft to and moving said core sections.

9. In combination, a collapsible core comprising a plurality ofsegmental core sections, means to move two adjacent core sections inopposite directions into and out of the plane of operative continuityand obliquely into and out of operative continuity.

10. In combination, a. collapsible core comprising two pairs ofsegmental core sections, the sections in each pair being diametricallyopposite each other, and means to move adjacent sections of a pair ofsections in opposite directions into and out of the plane of operativecontinuity and obliquely into and out of operative continuity.

11. In combination, a collapsible core comprising a plurality ofsegmental core sections, means to move two associated core sections indifferent directions into and out of the plane of operative continuityand obliquely into and out of operative continuity.

12. In combination, a collapsible core comprising a plurality ofsegmental core sections, means to move two adjacent core sections inopposite directions into and out of the plane of operative continuityand into and out of operative continuity.

PETER DE MATTIA

